Optics Masters is an optical fabrication company and supplier to many Gvnt Primes. Specializing in optics in the Visible to UV to IR spectrum. Materials we work on range from BK-7, Ge, ZnSe, ZnS, MgF2, CaF2, Silicon and many other materials. We can do substrates with sizes from .250″ to 18″ diameter with thicknesses from .010″ to whatever is needed. Specs achievable are as low as 1/20wave TWF, 10-5 SQ Per Mil-PRF-13830, Wedge in the sub second range and provide ALL the test documentation needed to satisfy even the most stringent requirements including AS9100. We are an ISO 9001:2015 Certified, ITAR Registered US Based Company. If you have any requirements for witnesses or any drawing spec based optics, please give us a call or email us to see what we can do for you.